What series do you think kept their quality all the way through?

[The Cool Thatguy]

We all have shows that we love, even though they are less than perfect.

Sons of Anarchy, I love, but it did go on a little too long. The same of Burn Notice.

But some shows kept their quality, from beginning to end.

For me, it was Person of Interest and Strikeback.

The quality on them may have dipped at certain points, but were still great watches and rewatches.

What are some shows you thought kept their quality?

[CliffHanger2]

The Mandalorian
S.W.A.T
Chicago P.D
Reacher
N.C.I.S (any one)

[godisawesome]

Avatar: The Last Airbender - stands out to em because it was one of the series smart enough to pace itself out early on, so it really only increased in quality overall, and not only is there only *one* filler episode, but the show knew how to properly mock it.

[The Cool Thatguy]

The Mandalorian
S.W.A.T
Chicago P.D
Reacher
N.C.I.S (any one)

I was thinking along the line of series that have ended, not that are ongoing

[Mark Trail]

The Shield
TNG after the first season
Mary Tyler Moore
Mad Men
King of the Hill

[WebLurker]

Leverage comes to mind.

[phonogram12]

Bob's Burgers

You're the Worst

[James Cameron]

SG1 and Atlantis

[the illustrious mr. kenway]

Twelve Monkeys (Syfy)

[Powerboy]

My choices are generally from the days of episodic television when it was a lot easier to maintain the quality they started with.

The Jeffersons (Strangely, was a spinoff from "All in the Family" but maintained itself better, mostly due to AinF losing half their cast in the last season).

The Wild Wild West

The Six Million Dollar Man

The Bionic Woman

Magnum, P.I.

I could go on and on.

Far more recent shows:

The Mandalorian

Lost in Space (Netflix version)

Star Trek Continues

I grant you, it's far easier to maintain quality when a season is ten episodes or so and sometimes more than a year apart.

[Alan2099]

M*A*S*H*
Cheers
Seinfeld (some people hate the last episode, but I didn't think it was bad myself. It fit the series.)
Dead Like Me (as long as we don't count the movie)

[j9ac9k]

Firefly
Green Lantern: The Animated Series

[Kirby101]

Breaking Bad is first show I thought of.

[K7P5V]

Definitely, my choice would be...

X-Men: Evolution

[Timothy Hunter]

Very few shows retain the same level of quality from the first season to the last. Most either gradually get better or worse.